I changed it to the following in the Calculation tab. I can not use Validation tab because I do not want the information changed in the field. I just want the message to pop up. The trouble is once the message is triggered it comes up every time you enter another field. How do I stop this from happening.

I am having them key a temmperture in the field that they have taken with a thermometer. If the temp they have taken is to high or to low depending on the criteria then the message popes up reminding them they need to key a Corrective Action in a nother part of the form.